Rainbow Electronics MAX5071 - Manual (Page 5)

MAX5070/MAX5071
High-Performance, Single-Ended, Current-Mode
PWM Controllers
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ELECTRICAL CHARACTERISTICS (continued)
(V CC = +15V, R T = 10kΩ, C T = 3.3nF, V VREF = OPEN, C VREF = 0.1µF, COMP = OPEN, V FB = 2V, CS = GND, T A = -40°C to +125°C ,
unless otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
CURRENT-SENSE AMPLIFIER
Gain A CS (Notes 3, 4) 2.85 3 3.26 V/V
MAX5070A/B (Note 3) 0.95 1 1.05
Maximum Current-Sense Signal V CS_MAX
V COMP = 5V, MAX5071_ 0.84 0.935 1.03
V
Power-Supply Rejection Ratio PSRR 12V
≤
V CC
≤
25V 70 dB
Input Bias Current I CS -1 -2.5 µA
Delay From CS to OUT t CS_DELAY 50mV overdrive 60 ns
MOSFET DRIVER
OUT Low-Side On-Resistance V RDS_ONL I SINK = 200mA 4.5 12
Ω
OUT High-Side On-Resistance V RDS_ONH I SOURCE = 100mA 3.5 9 Ω
I
SOURCE
(Peak) I
SOURCE
C
OUT
= 10nF 2 A
I SINK (Peak) I SINK C OUT = 10nF 1 A
Rise Time t r C OUT = 1nF 15 ns
Fall Time t f C OUT = 1nF 22 ns
UNDERVOLTAGE LOCKOUT/STARTUP
Startup Voltage Threshold V CC_START 15.2 16 16.8 V
Minimum Operating Voltage After
Turn-On
V CC_MIN 9.2 10 10.8 V
Undervoltage-Lockout Hysteresis UVLO HYST 6 V
PWM
MAX5070A/MAX5071A 94.5 96 97.5
Maximum Duty Cycle D MAX
MAX5070B/MAX5071B/MAX5071C 48 49.8 50
%
Minimum Duty Cycle D
MIN
0 %
SUPPLY CURRENT
Startup Supply Current I START 32 65 µA
Operating Supply Current I CC V FB = V CS = 0V 3 5 mA
Zener Bias Voltage at V CC V Z I CC = 25mA 24 26.5 V
THERMAL SHUTDOWN
Thermal Shutdown T SHDN +150 °C
Thermal-Shutdown Hysteresis T HYST 30 °C
SYNCHRONIZATION (MAX5071A/MAX5071B only, Note 5)
SYNC Frequency Range f SYNC 20 1000 kHz
SYNC Clock Input High
Threshold
V SYNCINH 3.5 V
SYNC Clock Input Low Threshold V SYNCINL 0.8 V
SYNC Clock Input Minimum
Pulse Width
t PW_SYNCIN 200 ns
SYNC Clock Output High Level V SYNCOH 1mA external pulldown 4.0 4.7 V
SYNC Clock Output Low Level V SYNCOL R SYNC = 5k
Ω
0 0.1 V